Yaesu FT-991 S-meter calibration table HF/50MHz

 

 July 20, 2015, Ta= +27oC.

FT-991 S/N: 5G120045. FT-991 FIRMWARE: MAIN: V01-13, DSP: V01-02, TFT: V01-02, C4FM: V02-10.

Rhode&Schwarz Signal Generator SMUV 301.012052,HP/Agilent coaxial attenuators: HP8491A, HP11708A, fixed attenuators, 10, 20, 30dB.

Frequency: 3530 KHz, BW= 500Hz, CW-U, IPO-AMP1 (correct readings). S-meter - factory adjustment.

 

                                                              Yaesu FT-991 S-meter calibration table HF (1.8 - 28 MHz)

Input Level

[dBm]

S-meter standard

[mV/µV]

S-meter

readings

FT-991

S-meter readings

S-meter

Error

[dB]

 7.0  Not applicable  S9+80  Not applicable  -
 -3  Not applicable  S9+70  Not applicable  -
 -13  50mV  S9+60  S9+60 / out of range (>60)
 +5 dB
 -23  15.81mV  S9+50  S9+55  +5 dB
 -33  5.00mV  S9+40  S9+47  +7 dB
 -43  1.581mV  S9+30  S9+33  +3 dB
 -53  500µV  S9+20  S9+25  +5 dB
 -63  158.1µV  S9+10  S9+15  +5 dB
 -73  50.15µV  S9  S9+4dB  +4 dB
 -79  25.13µV  S8  S8.2  +1 dB
 -85  12.6µV  S7  S6.8  -1 dB
 -91  6.31µV  S6  S4.5  -9 dB
 -97  3.16µV  S5  S2  -18 dB
 -103  1.59µV  S4  S1  -20 dB
 -109
 0.79µV  S3  no deflection  -
 -115  0.4µV  S2  no deflection  -
 -121  0.2µV  S1  no deflection  -
 -127  0.1µV  S0  no deflection  -
         

                                                                                 

July 20, 2015, Ta= +26oC.

FT-991 S/N: 5G120045. FT-991 FIRMWARE: MAIN: V01-13, DSP: V01-02, TFT: V01-02, C4FM: V02-10.

Rhode&Schwarz Signal Generator SMUV 301.012052,HP/Agilent coaxial attenuators: HP8491A, HP11708A, fixed attenuators, 10, 20, 30dB.

Frequency: 50100 KHz, BW= 500Hz, CW-U, IPO-AMP2 (correct readings). S-meter - factory adjustment.

 

                                                                   Yaesu FT-991 S-meter calibration table 50MHz

Input Level

[dBm]

S-meter standard

[mV/µV]

S-meter

readings

FT-991

S-meter readings

S-meter

Error

[dB]

 -13  Not applicable  S9+80  Not applicable  -
 -23  Not applicable  S9+70  Not applicable  -
 -33  500µV  S9+60  S9+60
 +0 dB
 -43  158.1µV  S9+50  S9+48  -2 dB
 -53  50.0µV  S9+40  S9+36  -4 dB
 -63  15.81µV  S9+30  S9+28  -2 dB
 -73  5.00µV  S9+20  S9+18  -2 dB
 -83  15.81µV  S9+10  S9+8  -2 dB
 -93  5.015µV  S9  S8.5  -3 d B
 -99  2.513µV  S8  S6.8  -6.5 dB
 -105  1.26µV  S7  S5  -12 dB
 -111  0.631µV  S6  S2.2  -22 dB
 -117  0.316µV  S5  <S1  -25 dB
 -123  0.159µV  S4  no deflection  -
 -129
 79nV  S3  no deflection  -
 -135  40nV  S2  no deflection  -
 -141  20nV  S1  no deflection  -
 -147  10nV  S0  no deflection  -
         

 SP5ELA

Warszawa,  July 20, 2015

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